I need assistance in fully spec’ing out a Sunsynk 8kw in terms of PV
I have large loads on both essentials and non essentials, and while they are balanced nicely, I am obviously looking to utilize my setup to its maximum potential within a margin of safety.
Loads are under control, and with some smart automation, I will not exceed what my inverter can supply for essnetial, and the rest of the heavy current items being on eskom where it will stay, I have no interest in going fully off grid.
I recently installed/upgraded an 8kw Sunsynk, and I am looking to spec it to the hilt in terms of panels.
I currently have a bank of 8x275 Canadian solar panels in production from my previous system, This bank will stay for now, and I am looking to add another bank within the next day or two, as I am expecting heavy stock shortages.
Bank 1 = 275wx8 to be upgraded to the same to make up the 10.4kw allowed on the inverter, so target ideally 5200w
Bank 2 = empty, target 5200w
For bank 2, I have been looking at adding in 8 to 10 panels, depending to fill bank 2, and then next year I want to replace bank 1 as well with a similar setup to get to my ideal of 10.4kw @22A, with say 15% to 20% headroom
If I spec for example, 9 JA 545’s, at 49.75Voc that is a total VOC 447.75, which exceeds the recommended 425v, while I know that is under rare conditions, there is no headroom.
If I look at the 8x620w Jinkos, that is a total VOC of 444v, which is also above that threshold.
In both these cases, I have plenty headroom on operating current which is around 13.5A, with spec calling for 22.
If I look at the Trina 575w, that has a Voc of only 46v, at 8 panels, that gives me a VOC of 368 and it has the highest current rating at 15A, I can maybe even sneak 9 panels…
So there is my answer… but I cannot find stock.
Freshtech has JA and a 450w Trina, Inverter Warehouse has Jinko. GoG has nothing…
What would you recommend to fill both MPPT’s to the max, not leaving anything on the table, but within a margin of safety and where I can actually get stock,